自己写的。C语言。题解 | #提取不重复的整数#

#include<stdio.h>
int main() {
    int c, i = 0, j, k;
    char line[9];
    while ((c = getchar()) != 10) {
        line[i++] = c;
    }
    j = i - 1;
    while (j >= 0) {
        for (k = j + 1; k < i; k++) {
            if (line[k] == line[j]) {
                k = i + 1;
            }
        }
        if (k == i) {
            printf("%c", line[j]);
        }
        j--;
    }
    printf("\n");
    return 0;
}